GB1498584A - Pulse duration to analogue current converter - Google Patents
Pulse duration to analogue current converterInfo
- Publication number
- GB1498584A GB1498584A GB7128/76A GB712876A GB1498584A GB 1498584 A GB1498584 A GB 1498584A GB 7128/76 A GB7128/76 A GB 7128/76A GB 712876 A GB712876 A GB 712876A GB 1498584 A GB1498584 A GB 1498584A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- transistor
- pulse duration
- resistor
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
- H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses
Landscapes
- Amplifiers (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
1498584 Pulse duration demodulator HONEYWELL Inc 24 Feb 1976 [19 March 1975] 07128/76 Heading H4L A pulse duration to analogue current converter comprises an integrating network 8, 16, to which transistors 4, 12 whose bases are coupled to reference voltage V R , are connected, the collector current of transistor 4 being varied in accordance with the variable duration of constant period pulses applied at terminal 18, the averaged output being amplified at 22 and converted to a corresponding current in a load resistor connected at 28. To minimize the required value of resistor 30, the amplifier feedback comprises resistors 32 and 38, and transistor 34 whose base is connected to the reference voltage, the constant current characteristic of the path 38-34-32 ensuring that variations in the emitter voltage of transistor 26 are fully fed back to the inverting input of amplifier 22, the constant D.C. shift across resistor 32 ensuring that the amplifier operates in the linear region. The load current is proportional to the pulse input duty cycle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/559,680 US3991323A (en) | 1975-03-19 | 1975-03-19 | Pulse duration to current converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1498584A true GB1498584A (en) | 1978-01-18 |
Family
ID=24234583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7128/76A Expired GB1498584A (en) | 1975-03-19 | 1976-02-24 | Pulse duration to analogue current converter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3991323A (en) |
| JP (1) | JPS51117561A (en) |
| CA (1) | CA1048650A (en) |
| DE (1) | DE2610766C2 (en) |
| GB (1) | GB1498584A (en) |
| NL (1) | NL7602513A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5940000B2 (en) * | 1977-11-14 | 1984-09-27 | 松下電器産業株式会社 | DC motor speed control device |
| JPS6052673B2 (en) * | 1977-11-21 | 1985-11-20 | 日本電気株式会社 | motor speed control circuit |
| US4277697A (en) * | 1979-01-15 | 1981-07-07 | Norlin Industries, Inc. | Duty cycle control apparatus |
| US4398104A (en) * | 1980-09-30 | 1983-08-09 | Garrett Electronics | Low drift tuning circuit |
| JPS5816396A (en) * | 1981-07-20 | 1983-01-31 | パイオニア株式会社 | Voltage-current convertion circuit |
| US4598251A (en) * | 1982-06-16 | 1986-07-01 | Rosemount Inc. | Frequency to current converter circuit |
| WO1984000087A1 (en) * | 1982-06-16 | 1984-01-05 | Rosemount Inc | Frequency to current converter circuit |
| DE3479466D1 (en) * | 1983-10-05 | 1989-09-21 | Bosch Gmbh Robert | Electronic circuit for converting a pulse width into a proportional voltage |
| US4716398A (en) * | 1987-02-26 | 1987-12-29 | John Fluke Mfg. Co., Inc. | Linearity control circuit for digital to analog converter |
| DE3911974A1 (en) * | 1989-04-12 | 1990-10-18 | Rump Elektronik Tech | D=A converter with 1 bit digital input - has RC smoothing with time constant at multiple clock rate |
| KR930008423B1 (en) * | 1991-01-17 | 1993-08-31 | 삼성전자 주식회사 | P.w.m. signal's demodulation |
| WO1996010865A1 (en) * | 1994-10-03 | 1996-04-11 | Motorola Inc. | Method and apparatus for providing a low voltage level shift |
| US5477180A (en) * | 1994-10-11 | 1995-12-19 | At&T Global Information Solutions Company | Circuit and method for generating a clock signal |
| JP4311482B2 (en) | 2007-05-17 | 2009-08-12 | ソニー株式会社 | Imaging circuit, CMOS sensor, and imaging apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435252A (en) * | 1964-08-26 | 1969-03-25 | Bell Telephone Labor Inc | D.c. restorer |
| US3564444A (en) * | 1966-02-21 | 1971-02-16 | Burroughs Corp | High gain variable current source |
| US3600527A (en) * | 1969-12-05 | 1971-08-17 | North Electric Co | Dial speed tester |
-
1975
- 1975-03-19 US US05/559,680 patent/US3991323A/en not_active Expired - Lifetime
- 1975-12-08 CA CA75241233A patent/CA1048650A/en not_active Expired
-
1976
- 1976-02-24 GB GB7128/76A patent/GB1498584A/en not_active Expired
- 1976-03-10 NL NL7602513A patent/NL7602513A/en not_active Application Discontinuation
- 1976-03-15 DE DE2610766A patent/DE2610766C2/en not_active Expired
- 1976-03-16 JP JP51027783A patent/JPS51117561A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA1048650A (en) | 1979-02-13 |
| JPS51117561A (en) | 1976-10-15 |
| US3991323A (en) | 1976-11-09 |
| DE2610766A1 (en) | 1976-09-30 |
| DE2610766C2 (en) | 1986-08-28 |
| NL7602513A (en) | 1976-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950224 |